Unit 1-the Particulate Nature Of Matter Flashcards
Melting
The process that occurs when a solid turns into a liquid
Melting point
The temperature at which a substance melts. Each substance has a specific melting point
Boiling
The process that occurs when a liquid turns into a gas
Boiling point
The temperature at which a substance boils. Each substance has a specific boiling point
Evaporation
The process that occurs at the surface of a liquid as it turns into gas. Evaporation con occur at temperatures lower than the boiling point of a liquid
Freezing
The process that occurs when a liquid turns into a solid
Freezing point
The temperature at which a substance freezes. This has the same value as the melting point
Condensation
The process that occurs when a gas turns into a liquid
Sublimation
The process that occurs when a solid turns into a gas without first turning into a liquid
Brownian motion
The random motion of visible particles caused by bombardment by much smaller particles
Diffusion
The process that occurs when particles move from a region of high concentration to a region of low concentration
Solid
Surface boundary and a fixed shape
Strong forces of attraction between particles thay vibrate.
Liquid
Surface boundary and takes place of container
Strong forces of attraction between particles
Particles slide past each other
Gas
No surface boundary and no fixed shape or volume
Particles held by very weak bonds can move far apart
Brownian motion
Occurs when the larger particles are being bombarded by smaller particles so they get moved.
